Bookbinding machine



FIG. 1 is a front right perspective view of a bookbinding machine showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front left perspective view thereof;

FIG. 9 is a rear left perspective view thereof; and,

FIG. 10 is a rear right perspective view thereof. 

The ornamental design for a bookbinding machine, as shown. 